namespace QRScript.Console;

[Command("run", Description = "Run a Glyph program.")]
public class RunCommand : ICommand
{
    [CommandParameter(0, Name = "file", Description = "Path to the Glyph source file.")]
    public string FilePath { get; set; }

    [CommandOption("input", 'i', Description = "Path to optional input file.")]
    public string InputPath { get; set; }

    [CommandOption("binary", 'b', Description = "Run binary file")]
    public bool Binary { get; set; }

    [CommandOption("verbose", 'v', Description = "Enable verbose output.")]
    public bool Verbose { get; set; }

    public async ValueTask ExecuteAsync(IConsole console)
    {
        var lines = new string[] { };
        var fileInfo = new FileInfo(FilePath);
        var file = fileInfo.FullName;
        var dir = Path.GetDirectoryName(FilePath);
        var path = Path.Combine(dir, file);

        if (!System.IO.File.Exists(path))
        {
            await console.Error.WriteLineAsync($"Error: File not found: {file}");
            return;
        }

        if (Binary)
        {
            // TODO: Implement binary file execution
            await console.Error.WriteLineAsync($"Error: Binary file execution not implemented");
            return;
        }

        lines = await System.IO.File.ReadAllLinesAsync(path);
        var source = lines.JoinLines();

        if (!string.IsNullOrEmpty(InputPath))
        {
            // You could inject input to the interpreter here
            string input = await File.ReadAllTextAsync(InputPath);
            // TODO: Attach to interpreter input stream
        }

        if (Verbose)
        {
            await console.Output.WriteLineAsync($"Executing: {path}");

            if (source.ExceedsLengthLimit(1259))
                await console.Output.WriteAsync($"Warning: source code exceeds {1259:n} characters.");
        }

        Runner.Interpret(lines);
    }
}